ABB UMC100.3 Manual page 37

C O N F I G U R I N G T H E M OTO R P R OT E C T I O N F U N C T I O N S
Protection functions can be either on or off. If switched on, they can trigger a protection trip or a warning (excluding the thermal
overload which is always active and triggers a trip). For some functions an optional delay can be specified. Some protection func-
tions are only active after motor start-up while others are active during motor start.
Below is an overview of the available protection functions and when they are active. For details see the following sections.
Protection Function current
Electronic Overload
Electronic Overload
Prewarning
Locked Rotor
High Current
Low Current
Imbalance
Phase Loss Protection
PTC Protection
Earth Fault Protection
Load Shedding / Voltage Dip
Phase Sequence Protection
The motor start-up period ends when the motor current drops to 135% of Ie or if the class time (i.e. Class 5 -> 1.5 s,
Class 10 -> 3 s , class 20 -> 6 s, class 30 -> 9 s, class 40 -> 12 s) is over. The class time begins with the start command.
The motor-related and protection-related parameters shall be set according to the motor manufacturer's data sheet. Other para-
meters of the UMC shall be carefully selected based on the process and the system requirements.
When active
Always
Always
During motor start
After motor start
After motor start
Always (Motor current > 25%
of I and all three phases
e
available)
Always (Motor current > 25%
of Ie)
Always
Always
After start-up
Always
Not in testposition
Always
Available Options:
Trip/Warning/Off
Trip
Warning
Trip / OFF (800%)
Trip/Warning/OFF
separate warning and trip levels
optional delay
Trip/Warning/OFF
separate warning and trip levels
optional delay
Trip/Warning/OFF
(OFF = only together with phase
loss) separate warning and trip
levels
Trip, Off
Trip, Warning, Off
Trip, Warning, Off (255%) separate
warning and trip levels
See subsection voltage Dip
Trip, Warning, OFF
Automatic Fault Delay
Reset Possible
Yes -
- -
- x
- x
- x
Yes Depending on trip class
2 / 3.5 / 6.5 / 9.5 / 12.5 s
- Depending on trip class
1.5 / 3 / 6 / 9 / 12 s
Yes after cooling -
(excluding PTC wire
break and short
circuit)
- x
-
- Depending on trip class
1.5 / 3 / 6 / 9 / 12 s
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